| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 46k - Prairie Coteau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 57042 - Madison, SD | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 10 | 21 | 33 | 46 | 55 | 60 | 58 | 48 | 35 | 21 | 7 | 33 |
| Avg Max Temp (°F) | 22 | 29 | 40 | 56 | 69 | 79 | 83 | 81 | 73 | 60 | 40 | 26 | 55 |
| Avg Precip (In.) | .55 | .63 | 1.71 | 2.5 | 3.23 | 3.78 | 3.14 | 3.14 | 2.48 | 1.91 | 1.31 | .57 | 24.94 |